Safety device for shuttle-changing apparatus for use in automatic looms



April 21, 1931. Y TQYODA 1,802,162

SAFETY DEVICE FOR SHUTTLE CHANGING APPARATUS FOR USE IN AUTOMATIC LOOMS Filed Dec. 24, 1929 2 Sheets-Sheet 1 7 E f INII/ENTOR.

41cc 0L8- A TTORNE Y.

April 21, 1931. K. TOYODA 1,802,162

SAFETY DEVICE FOR SHUTTLE--CHANGING APPARATUS FOR USE IN AUTOMATIC LOOMS Filed Dec. 24, 1929 2 Sheets-Sheet 2 N VEN TOR.

A TTORNE Y.

Patented Apr. 21, 1931 UNETE sures PATENT OFFICE KIIGHIRO TOYODA, OF TOKYO, JAPAN SAFETY DEVICE FOR SHUTTLE-CHANGING APPARATUS FOR USE IN AUTOMATIC LOOMS Application filed December 24, 1929, Serial No. 416,273, and in Japan September, 1929.

My invention relates to automatic looms and has for its particular object to provide a safety device adapted for use in the shuttle changing mechanism in such looms, in which the shuttle is replenished by another shuttle actuated by a weft fork and/or feeling motion, without the stopping of or reduction in the speed of the operation of the loom.

Hereinafter, such an automatic loom will be referred to as a non-stop shuttle changing automatic loom to thereby distinguish from an automatic loom in which the shuttle replenishing motion is accomplished, after the loom has first been stopped, or its speed tem- 16 porarily decreased from its normal speed.

In non-stop shuttle changing automatic looms, it may occur for unforeseen reasons, that a shuttle or shuttles and/or parts of the shuttle changing mechanism are damaged whereby the proper action of the mechanism is interfered with.

The chief object of the present invention is to provide means for absolutely preventing such an occurrence thereby protecting the shuttles and every part of the shuttle changing mechanism against possible damage.

While in the appended drawing, I have by way of example, illustrated an embodiment of the safety device in accordance with this invention as applied to a non-stop shuttle changing automatic loom, the invention is, of course, not confined to this particular loom.

In the drawing, Fig. 1 is a side view of the safety device attached to the shuttle changing mechanism, in inoperative position, parts being shown in section, while Fig. 2 is a similar view as Fig. 1 but showing the devicein operation.

In the drawing, 1 is the slay sword, 2 a part of the frame of the loom, 3 the front plate of the shuttle box, 4 the guide plate, 5 the back plate and 6 the rocker arm connecting the front plate 3 and back plate 5. 7 is the receiving rod to which the lower arm of a two- 'arm lever 8 is pivotally connected. 8 is pivoted to the frame by means of a central pivot. The shuttle magazine 11 is suspended on the frame by means of a pivot pin 11 about which the magazine 11 may be freely rocked, 50 tho it is normally held in a perpendicular 13a. At 14 is shown a spring whereby a pin position by its weight and a stop attached to frame 2. 13 is a protecting lid for the shut= tle ejecting rods 10 and their guides, which lid is hinged to the magazine 11 by the pin 8' of semi-circular cross-section on the end of lever 8 is pressed into a similarly shaped recess provided at the end of a rod 9, so that the latter and lever8 are pivotally connected by. pin 8, while springl l maintains the pin' 85in position in the semi-circular recess of rod 9. 1

' An angular finger 15 is pivoted at the bottom corner of magazine 11 by a pivot pin 16 so as to have a free swinging movement. Fromthe horizontal part of the finger is suspended a rod 17. To the lower end of said rod 17 a catch 0 is pivoted. As shown in Fig. 2, a projecting arm 18 is secured to the back plate 5 (or front plate as the case may be) of the shuttle box. 19 is an abutment screw threaded into a rod 20ipivoted to the loom frame by meansof pivot pin 21 and a bracket. To the lower end of rod 20 is pivotally con nected a rod 22 which latter is operatively connectedwith a stop motion of the loom.

The safety device, according to this invention, fully protects all parts of the shuttle changing apparatus, shuttle box, and the shuttles insuring perfect operation of the loom inthe following cases:'

1. When the magazinell becomes empty, or when the lowest shuttle is wrongly placed, or. in case a wrong shuttle as to size and shape is placed in the magazine by mistake and when it comes tothe lowest position, the loom is automatically stopped by means of the finger 15, the upper part ofwhich under normal circumstances is maintained at a certain position by a properly placed shuttle of the correct size so that throughthe rod 17 catch C is held in a position to clear a hook (D) secured to the slay (1), which moves back and forth all the time. But in case of no shuttle being left in the magazine, or in case of too small a shuttle being present, to keep the upright part of finger 15 held out in the proper position, the finger fulcrumed at 16 will'be moved into the space 'inthe magazine box by the weight of rod 17 and catch C, permitting the latter to move into the path of the hook D on the slay, the motion of which is transmitted through rods and links in the usual way to the stop mechanism with the result that the loom isi instantaneously stopped.

2. When the shuttle change motion takes place, but for some reason something other than the shuttle which .is to be replaced, should come in the way of the motion (the picker, for instance) preventing the shuttle from being ejected from the magazine into the shuttle box, such force will soon overcome the pressure of the spring 1 1 so that the pin 8' of lever 8 will become disengaged from rod 9, which thereby is released from the movement of lever 8. The further forward movement of rod 9, therefore, is stopped by the resistance while lever 8 alone moves forward as usual. In this way damage to any part of the magazine or to the shuttles or even to the material which came in the way is efiectively prevented. Furthern'iore, as lever 8 makes its return stroke, rod 9 is thereby pushed back beyond its original position because this time the end of the rod 9 is pushed by the end of lever 8, instead of by the pivot pin 8. By this additional movement of rod 9 the lid 13 is pushed away from its normal position together with the magazine box 11, which rocks about its pivot 11.

This motion msuits in the disengagement of finger 15 from the rod 17, which in dropping actuates the stop motion in same manner as before.

3. After the completion. of the shuttle change motion, but in case of any part or parts of the shuttle box not properly returning to their original position, the projection 18 attached to the back plate 5 of the shuttle box (or front plate as case may be) strikes the abutment screw 19 as slay (1) moves backwards causing rod 20 fulcrumed at 21 to swing back, thereby pulling rod 22 in the direction of the arrow shown in Fig. 2. Rod 22 being connected to the stop motion, the loom is instantaneously stopped.

I claim:

1. In automatic looms, in combination with the shuttlebox, the shuttle changing mechanism and the stop mechanism, a movable shuttle magazine, a shuttle ejecting member, a guide therefor connected to the said shutthe magazine, lever normally operatively connected with said shuttle ejecting member but adapted to be disconnected therefrom by abnormal resistance to said shuttle ejecting member and on its return stroke to engage with, and push back, said shuttle ejectmg member and said guide member to move said shuttle magazine, and a member on said shuttle magazine operatively connected to said stop mechanism and adapted to actuate said stop mechanism upon the movement of said shuttle magazine.

2. The combination as specified in claim 1, wherein said member on the shuttle magazine comprises an angular finger pivoted to said shuttle magazine and adapted to be rocked on said shuttle magazine becoming empty or on the lowest shuttle being wrongly placed, so as to actuate said stop mechanism.

3. The combination as specified in claim 1, wherein said lever is provided with a pin of semi-circular cross section pressed by a spring into a similarly shaped recess of said shuttle ejecting member thereby pivotally and detachably connecting said lever and said shuttle ejecting member.

In testimony whereof I allix my signature.

KIICHIRO TOYODA. 

